Question
Who invented the mouse of a
computer?Solution
The computer mouse was invented in 1963 by Douglas Engelbart, an engineer and computer scientist working at the Stanford Research Institute. The first mouse was a wooden shell with two metal wheels on the bottom, which were used to track movement on a surface.
Calculate the perimeter of a circular field with an area of 3675 square meters, using an approximation of π as 3.
The breadth ‘b’ of a room is twice its height and half of its length. Find the length of the longest diagonal of the room
A solid cube with side 'a' is made of a material weighing 400 kg. Another cube is hollow, made of the same material, with an outer side length '3a' and ...
Ratio of length to width of a rectangular field is 2:3. If the perimeter of the field is 380 metres, then find the area (in m2) of the field.
An iron pillar consists of two parts: one in the shape of a right circular cylinder and the other in the shape of a right circular cone. The radius of b...
A tank 60m long, 45m broad and 18m deep is dug in a ground 2000 m long and 45m wide. By how much will the level of the field rise if earth dug out of t...
The radius of a cylinder is increased by 20%, and its height is decreased by 10%. Find the percentage change in the volume of the cylinder.
Ratio of length to width of a rectangular field is 7:4. If the perimeter of the field is 220 metres, then find the area (in m2) of the field.
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